JP2022115242A - Color measuring device - Google Patents

Abstract

To solve the problem in which: a result of color measurement causes an error due to, in addition to time-course factors, the other factors; a conventional image forming apparatus performs calibration focused only on the number of prints being one of the time-course factors and does not consider the other factors.SOLUTION: A color measuring device comprises: an opening for taking light reaching from a measuring object into the device; a shutter unit that can be displaced between a closing position for covering the opening and an opening position for opening the opening, the unit having a reflection reference surface to be a reference of reflectance at a position facing the opening; and a control unit that can execute reference value acquisition processing of acquiring a reflection reference value by using the reflection reference surface. The device is provided therein a temperature detection unit that detects temperature. The control unit acquires a reference temperature when executing the reference value acquisition processing, and when a change in temperature with respect to the reference temperature exceeds a threshold, issues an alert.SELECTED DRAWING: Figure 22

Description

The present invention relates to a colorimetric device that performs colorimetry based on light arriving from an object to be measured.

Conventionally, there has been known a colorimetric device that performs colorimetry based on light arriving from an object to be measured. configured to be done.
The image forming apparatus described in Patent Document 1 counts the number of printed sheets when printing a job, and checks whether an automatic calibration cycle has been reached by comparing the number of printed sheets with a predetermined threshold value. When the automatic calibration cycle is reached, the image of the color chart for calibration is formed, the color chart image is measured by the in-line sensor, which is the color measurement unit, and the color measurement result is fed back to the printer profile. Make color adjustments.

JP 2016-107415 A

Errors in colorimetric results are caused by other factors in addition to temporal factors. The image forming apparatus disclosed in Japanese Patent Application Laid-Open No. 2002-200000 only performs calibration by focusing on the number of printed sheets, which is one of factors over time, and does not consider other factors.

In order to solve the above-mentioned problems, the colorimetric apparatus of the present invention is provided with an opening formed in an opening forming member disposed on the bottom surface of the apparatus, for taking in light arriving from a measurement target into the apparatus, and an opening for measurement. Between a light emitting unit that emits light toward the measurement object, an incident light processing unit that processes light incident through the opening, and a closed position that covers the opening and an open position that opens the opening. and a shutter unit having a reflection reference surface as a reference of reflectance at a position facing the opening, and reference value acquisition processing for acquiring a reflection reference value using the reflection reference surface. a temperature detection unit for detecting a temperature is provided inside the device, and the control unit acquires the reference temperature when executing the reference value acquisition process, and the reference temperature An alert is issued when a temperature change for the temperature exceeds a threshold.

FIG. 2 is a block diagram showing functions of the colorimetric device; Sectional drawing of an optical filter device. FIG. 2 is a perspective view of the colorimetric device viewed from above; FIG. 2 is a perspective view of the colorimetric device as seen from below; FIG. 2 is a plan view of the colorimetry device viewed from above; FIG. 2 is a plan view of the colorimetry device viewed from below; 3 is a perspective view of the body assembly; FIG. The perspective view which shows arrangement|positioning of each circuit board and a battery from upper direction. The perspective view which shows arrangement|positioning of each circuit board and a battery from the downward direction. The upper figure is a perspective view showing the upper surface of the panel substrate, and the lower figure is a perspective view showing the lower surface of the panel substrate. The upper figure is a perspective view showing the upper surface of the battery control board, and the lower figure is a perspective view showing the lower surface of the battery control board. The upper figure is a perspective view showing the upper surface of the light receiving part substrate, and the lower figure is a perspective view showing the lower surface of the light receiving part substrate. The upper figure is a perspective view showing the upper surface of the light emitting part substrate, and the lower figure is a perspective view showing the lower surface of the light emitting part substrate. AA sectional view in FIG. BB sectional view in FIG. FIG. 2 is a plan view of the colorimetry device viewed from above; FIG. 2 is a plan view of the colorimetry device viewed from above; FIG. 2 is a plan view of the colorimetry device viewed from above; FIG. 2 is a plan view of the colorimetry device viewed from above; FIG. 4 is a partially enlarged perspective view of the shutter unit; 4 is a flowchart showing the flow of processing when acquiring a reflection reference value; 4 is a flowchart showing the flow of processing when performing colorimetry;

The present invention will be briefly described below.
A colorimetry apparatus according to a first aspect includes an opening formed in an opening forming member disposed on the bottom surface of the apparatus, for introducing light arriving from a measurement target into the apparatus, and an opening for introducing light for measurement into the measurement target. an incident light processing unit that processes light incident through the opening; and a unit that can be displaced between a closed position that covers the opening and an open position that opens the opening. A shutter unit having a reflection reference surface serving as a reflectance reference at a position facing the opening, and control capable of executing a reference value acquisition process of acquiring a reflection reference value using the reflection reference surface. and a temperature detection unit for detecting temperature is provided inside the device, the control unit acquires a reference temperature when executing the reference value acquisition process, and a temperature change with respect to the reference temperature is a threshold. is exceeded, an alert is issued.

Colorimetric results of a colorimetric device are affected by temperature changes inside the device, and the greater the temperature change inside the device, the greater the measurement error. In this aspect, the control unit acquires the reference temperature when executing the reference value acquisition process, and issues an alert when the temperature change with respect to the reference temperature exceeds a threshold. Measurement errors can be suppressed.

In a second aspect based on the first aspect, the control unit uses a correction value for correcting a deviation of the measurement result due to the temperature change when the temperature change with respect to the reference temperature is equal to or less than the threshold value. The measurement result is corrected, and an alert is issued when the temperature change with respect to the reference temperature exceeds the threshold.

According to this aspect, when the temperature change with respect to the reference temperature is equal to or less than the threshold value, the control unit corrects the measurement result using a correction value for correcting the deviation of the measurement result due to the temperature change. If the temperature change with respect to the reference temperature is small, an appropriate colorimetric result can be obtained without performing the reference value obtaining process, thereby improving the user's convenience.

A third aspect is characterized in that, in the first or second aspect, the temperature detecting section is provided at a position where the light emitting section is arranged.
A measurement error caused by a temperature change depends on a change in the intensity of the measurement light emitted from the light emitting section caused by the temperature change. According to this aspect, since the temperature detection section is provided at the position where the light emission section is arranged, it is possible to appropriately correct the measurement result.

In a fourth aspect, in the third aspect, the temperature detection section is provided as a first temperature detection section, and a second temperature detection section for detecting temperature is provided in the incident light processing section, and the control section includes the reference temperature detection section. The temperature and the temperature change with respect to the reference temperature are obtained by the first temperature detection section, and the temperature obtained by the second temperature detection section is used for controlling the incident light processing section.
According to this aspect, the second temperature detection section is further provided, and the temperature acquired by the second temperature detection section is used for controlling the incident light processing section. Errors can be suppressed.

A fifth aspect is characterized in that, in any one of the first to fourth aspects, the control unit issues an alert when the elapsed time after executing the reference value acquisition process exceeds a specified time. and
According to this aspect, when the elapsed time from execution of the reference value acquisition process exceeds the specified time, the control unit issues an alert, so measurement errors due to the passage of time can be suppressed. .

According to a sixth aspect, in any one of the first to fifth aspects, a display section for performing various displays is provided, and the alert indicates to the display section the reflection reference value using the reflection reference surface. It is characterized by including a display that guides the acquisition operation.

According to this aspect, the display section that displays various types of information is provided, and the alert includes a display that guides the acquisition operation of the reflection reference value using the reflection reference surface on the display section. can easily grasp the content of the alert.

In a seventh aspect based on the sixth aspect, when receiving a command to turn on the power of the apparatus, the control unit displays a display for guiding an acquisition operation of the reflection reference value using the reflection reference surface. It is characterized by being displayed on the part.
According to this aspect, when the control unit receives a command to turn on the power of the device, the control unit causes the display unit to display a display that guides the acquisition operation of the reflection reference value using the reflection reference surface. Measurement errors due to passage of time can be suppressed.

An eighth aspect is characterized in that, in any one of the first to seventh aspects, the controller restricts colorimetry until the reference value obtaining process is performed after issuing the alert.
According to this aspect, after the alert is issued, the control unit restricts colorimetry until the reference value acquisition process is performed, so that it is possible to reliably suppress measurement errors caused by temperature changes.

A ninth aspect is any one of the first to eighth aspects, further comprising position detection means for detecting the position of the shutter unit, wherein the control unit, when executing the reference value obtaining process, performs the The reflection reference value is obtained when the shutter unit is at the closed position, and the acquisition of the reflection reference value is suspended when the shutter unit is at the open position.

According to this aspect, when executing the reference value acquisition process, the control unit acquires the reflection reference value if the shutter unit is at the closed position, and acquires the reflection reference value if the shutter unit is at the open position. Since acquisition of the reflection reference value is suspended, the reflection reference value can be appropriately acquired.

In a tenth aspect based on any one of the first to ninth aspects, the incident light processing section includes a variable wavelength optical filter that transmits a predetermined wavelength component of the incident light, and and a light-receiving portion for receiving the light.
According to this aspect, in the configuration in which the incident light processing unit includes a variable wavelength optical filter that transmits a predetermined wavelength component of incident light, and a light receiving unit that receives the light transmitted through the optical filter, Any one of the effects of the first to eighth aspects described above can be obtained.

An eleventh aspect is the tenth aspect, wherein the optical filter is a Fabry-Perot etalon.
According to this aspect, in the configuration in which the optical filter is a Fabry-Perot etalon, the effects of the ninth aspect described above can be obtained.

The present invention will be specifically described below.
The XYZ coordinate system shown in each drawing is an orthogonal coordinate system, with the XY plane being the horizontal plane and the YZ plane being the vertical plane.
Also, the Z-axis direction is a vertical direction and is an example of a first direction intersecting the top surface 50 e and the bottom surface 50 f of the colorimetry device 1 . Also, the Y-axis direction is an example of a second direction perpendicular to the first direction, that is, the vertical direction, which is the longitudinal direction when the colorimetric device 1 is viewed from the vertical direction. Also, the X-axis direction is a direction orthogonal to the Y-axis direction, and is an example of a third direction that is the lateral direction when the colorimetric device 1 is viewed from the vertical direction.
In this specification, the configuration of the colorimetric device 1 is described assuming that the bottom surface 50f is mounted on a mounting surface parallel to the horizontal plane, and the longitudinal direction of the colorimetric device 1 is along the Y-axis direction.

[Overall configuration of the colorimetric device 1]
First, the overall configuration of a colorimetric device 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG.
The colorimetry device 1 has a configuration for performing colorimetry based on light arriving from the measurement target 200 . The light that reaches from the measurement object 200 includes light that is reflected by the measurement object 200 and light that the measurement object 200 emits by itself.
The colorimetric device 1 includes a bandpass filter 7, an optical filter device 3, a light receiving section 4, a capacitance detection section 6, a light emitting section 9, an MCU (Micro Controller Unit) 10, a wired IF (Interface) 12, and a wireless communication section 13. , an operation unit 14 , a display unit 15 , a battery control unit 16 and a battery 17 .
The bandpass filter 7 , the optical filter device 3 , and the light receiving section 4 constitute an incident light processing section 2 that processes incident light that has arrived from the object 200 to be measured.

The band-pass filter 7 transmits light in the visible light range, for example, 380 nm to 720 nm, and cuts light in the ultraviolet light range and the infrared light range among the light that has arrived from the measurement object 200 and is incident. As a result, light in the visible light range enters the optical filter device 3 . Light reaching the bandpass filter 7 from the object 200 to be measured reaches the bandpass filter 7 via an opening 21a and a measurement window 87a (see FIG. 14), which will be described later.

The optical filter device 3 selectively transmits an arbitrary wavelength component from visible light that has passed through the bandpass filter 7 . Light transmitted through the optical filter device 3 is incident on a photodiode 4a (see FIG. 14), which is an example of a light receiving element, and processed by a light receiving section 4 including the photodiode 4a. The light receiving unit 4 converts the intensity of the received light into a voltage value, further converts the voltage value into a digital signal, and outputs the digital signal to the MCU 10 . The colorimetry apparatus 1 can measure the spectrum of the measurement target 200 by repeatedly performing wavelength selection by the optical filter device 3 and acquisition of received light intensity using the light receiving section 4 .

Here, the configuration of the optical filter device 3 will be described with reference to FIG. In this embodiment, the optical filter device 3 is a wavelength-tunable Fabry-Perot etalon that transmits a predetermined wavelength component of light that has arrived from the measurement target 200 and is incident thereon. is a filter.
In FIG. 2, the optical filter device 3 includes a tunable interference filter 45. The tunable interference filter 45 is built inside an exterior made up of the first glass member 30, the second glass member 31, and the case 32. .

The case 32 and the first glass member 30, and the case 32 and the second glass member 31 are respectively joined with a joining member 33 such as low-melting glass or epoxy resin. Also, the wavelength tunable interference filter 45 and the case 32 are fixed with a fixing material 34 such as an adhesive. The electrodes 36 on the outer surface of the case 32 and the wavelength tunable interference filter 45 are electrically connected by wire bonding 35 and wiring inside the case 32 .

The wavelength tunable interference filter 45 has a base substrate 37 and a diaphragm substrate 38 . The base substrate 37 and diaphragm substrate 38 are bonded by a bonding film 43 . A mirror 39 is formed on each of the base substrate 37 and the diaphragm substrate 38 . The facing mirror 39 has an outermost surface made of a conductor. The capacitance between the facing mirrors 39 is detected by the capacitance detector 6 (see FIG. 1). The capacitance detection unit 6 is composed of a CV (Capacitance to Voltage) converter, converts the detected capacitance into a voltage value, further converts it into a digital value, and transmits the digital value to the MCU 10 .
The distance between the facing mirrors 39 is controlled by an electrostatic actuator configured by facing a fixed electrode 40 and a movable electrode 41 concentrically formed when viewed in the Z-axis direction.

When a voltage is applied between the fixed electrode 40 and the movable electrode 41 facing each other, an electrostatic force causes the fixed electrode 40 and the movable electrode 41 to attract each other. At this time, the diaphragm part 42 formed concentrically is deformed, so that the mirror 39 of the diaphragm substrate 38 is drawn toward the base substrate 37, and the distance between the facing mirrors 39 is controlled. Then, the wavelength of the light transmitted through the variable wavelength interference filter 45 is selected according to the distance between the mirrors 39 facing each other.

During spectroscopic measurement, light from the measurement object 200 enters the optical filter device 3 from the second glass member 31 side to the first glass member 30 side along the optical axis CL. The optical axis CL is parallel to the Z-axis direction, and includes an aperture 21a (see FIG. 14), a measurement window 87a (see FIG. 14), a wavelength tunable interference filter 45, and a photodiode 4a (see FIG. 14). A line passing through the center of In particular, the aperture 21a, the measurement window 87a, and the variable wavelength interference filter 45 (see FIG. 2) form a perfect circle when viewed from the Z-axis direction, and the optical axis CL passes through their centers. Note that the optical axis CL may be referred to as the center position CL below.

The light incident on the optical filter device 3 interferes between the facing mirrors 39, and the light of the wavelength selected corresponding to the distance between the facing mirrors 39 passes through the wavelength variable interference filter 45. . The light that has passed through the variable wavelength interference filter 45 passes through the first glass member 30 and travels toward the light receiving section 4 .
Since the distance between the facing mirrors 39 changes with changes in temperature, a second thermistor 19 (see FIGS. 12 and 1) is provided near the optical filter device 3 to detect the temperature. . The second thermistor 19 is an example of a second temperature detector. Based on the temperature detected by the second thermistor 19, the distance between the facing mirrors 39 is corrected. That is, the temperature detected by the second thermistor 19 is used for controlling the optical filter device 3 that constitutes the incident light processing section 2 .
The above is the configuration of the optical filter device 3 .

Returning to FIG. 1, the MCU 10, which is an example of a control unit that performs various controls of the colorimetric device 1, is a microprocessor-based control device, and stores various programs and data necessary for controlling the colorimetric device 1. built-in memory.
The MCU 10 sends control information necessary for driving the electrostatic actuator constituted by the fixed electrode 40 and the movable electrode 41 facing each other as described with reference to FIG. is supplied to the optical filter device 3 . The MPU 10 then compares the information relating to the voltage value output from the capacitance detection unit 6 with the stored value, and feedback-controls the optical filter device 3 based thereon.

The light emitting unit 9 emits light for measurement toward the object 200 to be measured. The light emitting unit 9 is composed of a plurality of light emitting elements emitting light with different wavelength distributions, specifically a plurality of LEDs. The MCU 10 controls lighting and extinguishing of the light emitting unit 9 .

The wired IF 12 and the wireless communication unit 13 are components for communicating with an external device, and USB (Universal Serial Bus) can be adopted as an example of a standard for communicating via the wired IF 12 . As a standard of the wireless communication unit 13, Bluetooth can be adopted as an example. USB and Bluetooth are registered trademarks. The MCU 10 sends various data to external devices via the wired IF 12 or the wireless communication unit 13, and receives various data from the external devices. Further, the colorimetric device 1 can charge the battery 17 by receiving power supply from an external device via the wired IF 12 .

The operation unit 14 is composed of a power button and various operation setting buttons, and sends signals to the MCU 10 according to operations. The operation unit 14 will be further described later.
The display unit 15 is composed of, for example, a liquid crystal panel, and displays various information such as a user interface for setting colorimetric conditions based on signals sent from the MCU 10 and colorimetric results.

The shutter sensor 128, which sends a detection signal to the MCU 10, is an example of position detection means for detecting the position of the shutter unit 110, which will be described later. be. The shutter sensor 128 is provided on the lower surface of the light-emitting substrate 85, which will be described later, and sends a signal to the MCU 10 according to the change in magnetic force based on the distance from the magnet 127 (see FIG. 20) provided in the shutter unit 110. Based on the signal received from the shutter sensor 128, the MCU 10 can detect whether the shutter unit 110 is at the closed position or at the open position.

The battery 17 is a lithium-ion secondary battery in this embodiment, and supplies power to each component in the colorimetry apparatus 1 that requires power. Components that receive power from the battery 17 include the incident light processing section 2, which will be described later. The battery control unit 16 performs various controls such as charging control of the battery 17 .

[Appearance configuration of the colorimetric device 1]
Next, the external configuration of the colorimetric device 1 will be described with reference to FIGS. 3, 4, 5, and 6. FIG.
The device main body 50 of the colorimetric device 1 is configured such that the outer shell as a whole forms a box shape with a main housing 51 , an upper housing 52 and a bottom housing 53 . The main housing 51, the upper housing 52, and the bottom housing 53 are made of a resin material in this embodiment.
In each figure, reference numeral 50a indicates a +Y-direction side surface of the device main body 50, which is hereinafter referred to as a front surface 50a. Reference numeral 50b (see FIG. 6) indicates the side surface of the device body 50 in the +X direction, which is hereinafter referred to as the right side surface 50b. Reference numeral 50c denotes a side surface of the device main body 50 in the -X direction, which is hereinafter referred to as a left side surface 50c. Reference numeral 50d denotes a side surface of the device main body 50 in the -Y direction, which is hereinafter referred to as a rear surface 50d.
In this specification, the terms "upper", "lower", "left", and "right" are used by the user of the colorimetric device 1 while holding it as shown in FIG. It shall be used based on the direction seen from the user at the time.

3 to 6, the front surface 50a is formed by the front wall portion 51a of the main housing 51, the right side surface 50b is formed by the right wall portion 51b of the main housing 51, and the left side surface 50c is formed by the left wall of the main housing 51. The rear surface 50 d is formed by the rear wall portion 51 d of the main housing 51 .
Reference numeral 50e denotes a +Z-direction surface of the apparatus main body 50, which is hereinafter referred to as an upper surface 50e. Reference numeral 50f denotes the -Z direction surface of the device main body 50, which is hereinafter referred to as the bottom surface 50f.

The operation unit 14 and the display unit 15 are arranged along the Y-axis direction on the upper surface 50e of the device main body 50. As shown in FIG.
The operation unit 14 includes a power button 55 , an enter button 54 , a return button 56 and a cross button 60 . The cross button 60 is composed of an up button 61 , a down button 62 , a left button 63 and a right button 64 . In the colorimetric device 1 according to this embodiment, all the operation buttons are arranged on the upper surface 50 e and are integrated in the operation section 14 .

A power button 55 is a button for turning on/off the power of the colorimetric device 1 . A determination button 54 is a button for determining various settings displayed on the display unit 15, that is, a button for determining colorimetry conditions, and for executing colorimetry and acquisition of a reflection reference value to be described later. is also a button for The decision button 54 has a perfect circular shape when viewed from the Z-axis direction.
A ring-shaped light-emitting portion 59 is formed around the decision button 54, and the light-emitting color and light-emitting state change according to the state of the device.
The return button 56 is a button for returning to the previous state in the user interface displayed on the display unit 15, and is also a button for canceling the execution of the operation.

The cross button 60 is a button for selecting various items on the user interface displayed on the display unit 15 . The surface of the upper button 61 is marked with vertical lines 58a parallel to the Y-axis direction, and the surface of the bottom button 62 is marked with vertical lines 58b parallel to the Y-axis direction. The vertical lines 58a and 58b are positioned to pass through the center position CL when extended in the Y-axis direction.
The surface of the left button 63 is marked with a horizontal line 58c parallel to the X-axis direction, and the surface of the right button 64 is marked with a horizontal line 58d parallel to the X-axis direction. The horizontal lines 58c and 58d are positioned to pass through the center position CL when extended in the X-axis direction.

The display unit 15 displays various information such as colorimetric results. The display unit 15 is configured by a liquid crystal display 67 in this embodiment (see also FIG. 8). Hereinafter, the liquid crystal display 67 is abbreviated as LCD67. A display section cover 57, which is a transparent member, is provided above the LCD 67, and the display section cover 57 forms a part of the upper surface 50e.
In this embodiment, as shown in FIG. 14, there is almost no step between the upper surface of the display unit cover 57 and the upper surface of the operation unit 14, so that the upper surface 50e has no step as a whole. It is configured as a flat surface that is almost non-existent. However, the upper surface of the decision button 54 is slightly recessed as shown in FIG.

As shown in FIG. 14, the colorimetry device 1 has a portion where the opening 21a and the operation unit 14 overlap when viewed in the Z-axis direction. Accordingly, when the user aligns the opening 21a with the measurement site of the measurement target 200 (see FIG. 1), the alignment can be performed based on the position of the operation unit 14, that is, the opening can be performed with a simple configuration. The portion 21a can be aligned with the measurement site.
In particular, the colorimetric device 1 is configured as a handy type, and when the user operates the operation unit 14 with the fingertip Fs as shown in FIG. The position of the opening 21a can be easily understood intuitively.

Further, particularly in this embodiment, the center position of the opening 21a and the center position of the enter button 54 match when viewed from the Z-axis direction.
This makes it possible to more accurately align the opening 21a with the measurement site.

The determination button 54 has a circular shape when viewed from the Z-axis direction, and a cross button 60 for selecting various items is arranged around the determination button 54 . The cross button 60 is provided with a mark line radiating outward from the center position of the enter button 54 . The mark lines consist of vertical lines 58a, 58b and horizontal lines 58c, 58d.
This makes it easier to grasp the center position of the opening 21a when looking at the upper surface 50e of the device.

Further, the operation unit 14 includes a power button 55 and all buttons related to measurement on the upper surface 50e. As a result, the power button 55 and all buttons related to measurement can be easily seen, and the apparatus can be easily operated.
Further, the upper surface 50e including the operation portion 14 is formed flat. As a result, even when placed with the upper surface 50e facing downward, it can be stably placed.

Next, a shutter unit 110 is provided on the bottom surface 50f of the colorimetric device 1 as shown in FIGS. 4 shows the shutter unit 110 in the closed position, and FIG. 6 shows the shutter unit 110 in the open position. The shutter unit 110 can be displaced between the closed position and the open position by sliding along the Y-axis direction. Further, the shutter unit 110 is provided so as to be able to hold the closed position and the open position by the spring force of a spring (not shown).
The shutter unit 110 is configured with a shutter holding member 111 and a link member 113 . The shutter holding member 111 has a plurality of ribs 111a on its surface. The user can slide the shutter unit 110 in the Y-axis direction by hooking the pad of the finger on the rib 111a.

By opening the shutter unit 110, the opening 21a and the measurement window 87a are exposed as shown in FIG. The opening 21a and the measurement window 87a open at the bottom surface 50f of the device. The opening here means that light is taken in, and means that, for example, a transparent glass plate may be provided.
As also shown in FIG. 14, the aperture 21a is formed in the aperture forming member 21, and the measurement window 87a is formed in the condensing member 87 located in the +Z direction with respect to the aperture forming member 21. As shown in FIG. The measurement light emitted from the light emitting unit 9 passes between the light condensing member 87 and the opening forming member 21 as indicated by the arrow inside the opening 21a in FIG. released. Light arriving from the object 200 to be measured is taken into the apparatus through the opening 21a, and enters the incident light processing section 2 through the window 87a for measurement.

5 and 6, the center position CL coincides with the center positions of the opening 21a and the measurement window 87a. A straight line VCL is a straight line parallel to the Y-axis direction and passes through the center position CL when viewed from the Z-axis direction. A straight line HCL is a straight line parallel to the X-axis direction and the Y-axis direction and passes through the center position CL when viewed from the Z-axis direction.
In this embodiment, the center position CL matches the center position of the enter button 54 and the center position of the cross button 60 on the XY plane.
The power button 55 and the return button 56 are arranged symmetrically with respect to the straight line VCL as shown in FIG.

Next, as shown in FIG. 3, the wired IF 12 is provided on the front surface 50a of the apparatus main body 50. As shown in FIG. Further, as shown in FIG. 4, an opening 50m is formed in the rear surface 50d of the apparatus main body 50, and a reset switch 71 (see FIGS. 9 and 14) is provided behind the opening 50m. The reset switch 71 is a switch for resetting various settings of the colorimetry device 1 to the initial state.
Two openings 50n are formed in the -Z direction with respect to the opening 50m, and the user can easily carry the colorimetric device 1 by passing a strap (not shown) through these two openings 50n. there is

As shown in FIGS. 3, 4, and 15, grip portions 50g are formed on the right side 50b and the left side 50c of the device main body 50. As shown in FIGS. The grip portion 50g is constituted by recesses 51g formed in the right wall portion 51b and the left wall portion 51c of the main housing 51, respectively. The concave portion 51g is formed by a curved surface that extends toward the center of the device main body 50 in the X-axis direction along the -Z direction.
By providing the grip portion 50g, the user can easily and reliably grip the device main body 50. As shown in FIG.

[Substrate configuration of the colorimetric device 1]
Next, the substrate configuration of the colorimetric device 1 will be described.
The main body assembly 1a shown in FIG. 7 is an assembly body provided inside the main housing 51, and is configured by assembling a plurality of circuit boards and the like to a frame assembly 100 which is an assembly of a plurality of frames. there is
The plurality of circuit boards are composed of a panel board 65, a battery control board 70, a light receiving section board 80, and a light emitting section board 85, as shown in FIGS. The plurality of circuit boards are provided so as to overlap each other with a gap along the Z-axis direction. A battery 17 is arranged between the panel substrate 65 and the battery control substrate 70 in the Z-axis direction.

The configuration of each circuit board will be described below with reference to FIGS. 10 to 13 and other drawings as appropriate. In the following description, the +Z direction surface of each circuit board may be referred to as "upper surface" and the -Z direction surface may be referred to as "lower surface". Also, in FIGS. 10 to 13, illustration of some of the electronic components provided on the substrate is omitted.
The panel substrate 65 has an LCD connection portion 66 on its upper surface as shown in the upper diagram of FIG. The LCD 67 is connected to the LCD connection portion 66 by a cable 67a as shown in FIG.

In the top view of FIG. 10, on the upper surface of the panel substrate 65, contacts are provided at positions corresponding to the respective operation buttons constituting the operation section 14 described above for detecting the pressing of the respective operation buttons. Reference numeral 54a indicates a contact provided at a position corresponding to the enter button 54. FIG. Reference numeral 54a indicates a contact provided at a position corresponding to the enter button 54. FIG. Reference numerals 61a, 62a, 63a, and 64a denote contacts provided at positions corresponding to the upper button 61, the lower button 62, the left button 63, and the right button 64 (see FIG. 1, etc.), respectively. Reference numerals 55a and 56a denote contacts provided at positions corresponding to the power button 55 and return button 56, respectively.

As shown in the lower diagram of FIG. 10 , a first board connector 68 is provided on the bottom surface of the panel board 65 . The first board connector 68 and the fourth board connector 83 shown in the lower diagram of FIG. 12 are connected by an FFC (Flexible Flat Cable) 90 as shown in FIG. The light receiving portion substrate 80 is connected.
Further, as shown in the lower diagram of FIG. 10, the wireless communication section 13, which is a communication module, is provided on the lower surface of the panel substrate 65. As shown in FIG.

Next, the battery control board 70 will be described with reference to FIG. The battery control board 70 realizes the function of the battery control section 16 (see FIG. 1). The battery control board 70 has a reset switch 71, a wired IF 12, a first battery connector 72, and a second battery connector 73 on the upper surface as shown in the upper diagram of FIG. A battery control circuit (not shown in FIG. 11) is provided on the upper surface of the battery control board 70 .
The first battery connector 72 is connected to the battery 17 by a first battery cable 92 as shown in FIG. 8, and the second battery connector 73 is connected to the battery 17 by a second battery cable 93 as shown in FIG. .

The battery control board 70 has a second board connector 74 as shown in the lower diagram of FIG. The battery control board 70 and the light receiving section board 80 are connected by fitting the second board connector 74 and the third board connector 82 shown in the upper diagram of FIG. 12 . Thereby, the electric power of the battery 17 is supplied to each circuit board through the light-receiving part board 80 .

The battery 17 has a third thermistor 18 inside as shown in FIGS. When the internal temperature of the battery 17 obtained by the third thermistor 18 exceeds a predetermined allowable temperature, the MCU 10 cuts power supply from the battery 17 to each component.

Next, the light receiving portion substrate 80 will be described with reference to FIG. The light-receiving part substrate 80 has a PD (Photo
Diode) board 5 and the third board connector 82 described above. The PD substrate 5 has the above-described second thermistor 19 on its upper surface and a photodiode 4a on its lower surface as shown in FIG. The PD board 5 is a circuit board that constitutes the light receiving section 4 (see FIG. 1). That is, the PD substrate 5 constitutes an incident light processing section 2 (see FIG. 1) that processes incident light.
The light receiving section substrate 80 has the optical filter device 3, a fourth substrate connector 83, and a fifth substrate connector 84 on its lower surface. The fifth board connector 84 and the sixth board connector 88 shown in the lower diagram of FIG. 13 are connected by a connection cable 91 as shown in FIG. A substrate 85 is connected.

Electronic components, not shown in FIG. 11, are provided on the light receiving portion substrate 80 . The electronic components not shown in FIG. 11 include the MCU 10 (see FIG. 1), the CV converter that constitutes the capacitance detection unit 6 (see FIG. 1), the DC/DC converter that converts the voltage of the battery 17, the DC It includes an amplifier that adjusts the output from the /DC converter under the control of the MCU 10 and supplies it to the optical filter device 3 .

As shown in FIG. 11, a shielding sheet 29 is provided so as to surround the PD substrate 5 and the optical filter device 3 provided on the light receiving portion substrate 80 (see also FIG. 7). This suppresses external light from entering the PD substrate 5 and the optical filter device 3 .

Next, the light-emitting substrate 85 will be described with reference to FIG. The light-emitting substrate 85 has a condensing member 87 extending between the upper surface and the lower surface. The condensing member 87 is formed with the above-described measurement window portion 87a.
A sixth board connector 88 is provided on the lower surface of the light emitting part board 85 as shown in the lower drawing of FIG. The plurality of light emitting elements 86 are composed of light emitting elements emitting light with different wavelength distributions. In the present embodiment, nine light emitting elements 86 are provided, and a first thermistor 20, which is an example of a first temperature detection section, is provided for every three light emitting elements 86. FIG. The MCU 10 (see FIG. 1) averages the temperatures obtained from the three first thermistors 20 and obtains the temperature at the position where the light emitting element 86 is arranged.
A light shielding member 89 is provided around the light emitting element 86 to suppress leakage of the measurement light emitted from the light emitting element 86 by the light shielding member 89 .

As described above, the substrates are arranged in the Z-axis direction from the bottom surface 50f to the top surface 50e of the device main body 50 in this order as shown in FIG. and the panel substrate 65 are arranged so as to overlap each other.
With such a configuration, it is possible to suppress the size of the apparatus in the X-axis direction and the Y-axis direction, which are directions intersecting the Z-axis direction, that is, in the horizontal direction.
Instead of providing the battery control board 70, the electronic components mounted on the battery control board 70 may be arranged on the panel board 65 or the light receiving section board 80 as appropriate.
In addition, the configuration provided so as to overlap along the Z-axis direction is arbitrary two or three or more of the light emitting portion substrate 85, the light receiving portion substrate 80, the battery control substrate 70, the battery 17, and the panel substrate 65. It may be a combination.

The battery 17 has a shape extending in the Y-axis direction, which is the longitudinal direction of the device, and as shown in FIG. It faces the front inner wall surface 51e. A second end portion 17b of the battery 17 in the -Y direction faces the rear inner wall surface 51f of the main housing 51. As shown in FIG. That is, both ends of the battery 17 in the Y-axis direction face the inner surface of the side wall of the main housing 51 in the Y-axis direction.
As a result, the weight balance of the device main body 50 in the Y-axis direction is excellent, and the handling of the device is improved, compared to a configuration in which the battery 17 is arranged in a biased manner in the Y-axis direction.
In this embodiment, the battery 17 is located at the center of the apparatus in the X-axis direction as well, as shown in FIG.

[Reference value acquisition process using reflection reference surface]
Next, reference value acquisition processing using a reflective reference surface, that is, calibration will be described.
As shown in FIG. 20, a shutter member 112 is provided on the +Z direction side of the shutter holding member 111, and the shutter member 112 is provided with a white plate 125 that forms a reflection reference surface used as a reference for reflectance. It is The white plate 125 is white so that the reflectance is close to 100% in order to obtain the reflection reference value. The white plate 125 faces the opening 21a (see FIG. 6) when the shutter unit 110 is in the closed position. The MCU 10 (see FIG. 1) can acquire the reflection reference value by measuring the color of the white plate 125 when the shutter unit 110 is in the closed position.

FIG. 21 shows the flow of the reference value acquisition process for acquiring the reflection reference value. When it is time to acquire the reference value (Yes in step S101), the MCU 10 acquires the state of the shutter unit 110 (step S102). .
Here, in the present embodiment, the timing for obtaining the reference value is when the power button 55 (see FIG. 5, etc.) is pressed while the power is off, that is, when the MCU 10 receives a power-on command, and when the MCU 10 receives a power-on command. This is performed when the determination button 54 (see FIG. 5, etc.) is pressed to perform colorimetry in , and when the temperature change of the current temperature with respect to a reference temperature, which will be described later, exceeds a threshold.

Next, if the shutter unit 110 is in the closed position (Yes in step S102), the MCU 10 displays a reference value acquisition guidance display on the display unit 15 (step S103).
The reference value acquisition guidance display is a message that guides the user to acquire the reflection reference value, and can be, for example, a message such as "Calibration will be executed. Please press the decision button."
In this way, when the MCU 10 receives the power-on command, the display unit 15 displays a display that guides the acquisition operation of the reflection reference value using the reflection reference surface, thereby suppressing the measurement error caused by the passage of time. can be done.

As a result of the reference value acquisition guide display, when the decision button is pressed (Yes in step S104), the MCU 10 acquires the reflection reference value (step S105), and at that time, the first thermistor 20 (see FIGS. 1 and 13) ) acquires the current temperature as a reference temperature, and stores the acquired reference temperature in the built-in memory (step S106).
If the shutter unit 110 is at the open position at step S102 (No at step S102), an alert indicating that the shutter unit 110 is at the open position is displayed on the display section 15 (step S106). This alert can be, for example, a message display such as "Calibration cannot be performed because the shutter is open. Please close the shutter."

When it is time to acquire the reference value (Yes in step S101), the MCU 10 may skip steps S103 and S104 and execute steps S105 and S106 without user operation.

Next, referring to FIG. 22, processing for executing colorimetry will be described. When the determination button 54 (see FIG. 5, etc.) is pressed to execute colorimetry while the power is on, that is, when the MCU 10 receives a colorimetry execution command (Yes in step S201), the first thermistor 20 (See FIGS. 1 and 13) to obtain the current temperature and read the reference temperature. Then, it is determined whether or not the temperature change of the current temperature with respect to the reference temperature exceeds the threshold value Sa (step S202). The threshold Sa can be set, for example, within a range of 10.degree. C. to 20.degree.

As a result, if the temperature change is equal to or less than the threshold value Sa (No in step S202), the state of the shutter unit 110 is acquired (step S203). As a result, if the shutter unit 110 is in the closed position (No in step S203), an alert indicating that the shutter unit 110 is in the closed position is displayed on the display section 15 (step S206). This alert can be, for example, a message display such as "The shutter is closed. Please open it."

The MCU 10 then obtains a temperature correction value based on the current temperature (step S204). A temperature correction value is a temperature correction value for a reference temperature. More specifically, since the intensity of the measurement light emitted from the light emitting unit 9 changes according to temperature changes, the temperature correction value is a correction coefficient by which the intensity of the light received by the photodiode 4a (see FIG. 1) is multiplied. . This temperature correction value is stored in the internal memory as data for each temperature change amount with respect to each reference temperature, and can be read out. Then, the MCU 10 reflects the temperature correction value when performing colorimetry processing (step S205).

On the other hand, when the temperature change exceeds the threshold Sa in step S202 (Yes in step S202), an alert is issued (step S207). This alert is to be displayed on the display unit 15, and can be, for example, a message such as "Calibration needs to be executed. Please press the decision button." As described above, the alert display in step S207 includes a display that guides the acquisition operation of the reflection reference value using the reflection reference surface, so that the user can easily grasp the content of the alert.
Then, when the decision button 54 (see FIG. 5, etc.) is pressed in that state, the MCU 10 performs the reference value acquisition process described with reference to FIG. 21 (step S208).

As described above, the colorimetric device 1 includes the first thermistor 20 inside the device, and the MCU 10 acquires the reference temperature when executing the reference value acquisition process. (YES in step S202 of FIG. 22), an alert is issued (step S207 of FIG. 22). As a result, the reference value acquisition process is performed (step S208 in FIG. 22). As a result, it is possible to suppress measurement errors caused by temperature changes inside the apparatus.

The MCU 10 also has a temperature correction value for correcting deviations in measurement results due to temperature changes. are used to correct the colorimetric results (steps S204 and S205 in FIG. 22). If the temperature change with respect to the reference temperature exceeds the threshold Sa (Yes in step S202 of FIG. 22), an alert is issued (step S207 of FIG. 22).
As a result, when the temperature change with respect to the first reference temperature is small, an appropriate colorimetric result can be obtained without performing the reference value obtaining process, thereby improving the user's convenience.

The first thermistor 20 is provided at the position where the light emitting section 9 is arranged as shown in FIG. The measurement error caused by the temperature change depends on the intensity change of the measurement light emitted from the light emitting unit 9 caused by the temperature change. can be corrected appropriately.

As a modification of the above embodiment, a step of determining the elapsed time since the previous reference value acquisition process was performed may be provided immediately after the NO branch in step S202 of FIG. In this step, it is determined whether or not the elapsed time since the previous execution of the reference value acquisition process exceeds the threshold value Th. By performing such processing, it is possible to suppress measurement errors caused by the passage of time.

Such processing is set to skip the reference value acquisition processing when the power button 55 (see FIG. 5, etc.) is pressed while the power of the device is off, that is, when the power of the device is turned on. It is especially effective when This is because if the reference value acquisition process is skipped when the power of the device is turned on, the reference value acquisition process may not be executed unless there is a large temperature change since the previous reference value acquisition process was executed. be. When performing such processing, the date and time of execution of the reference value acquisition processing is stored in the built-in memory.

After issuing the alert in step S207, the MCU 10 restricts colorimetry until the reference value acquisition process is performed. As a result, it is possible to reliably suppress measurement errors caused by temperature changes.

When the MCU 10 receives a command to execute the reference value acquisition process, the MCU 10 acquires the reference value if the shutter unit is in the closed position, and suspends acquisition of the reference value if the shutter unit is in the open position. Thereby, the reflection reference value can be obtained appropriately.

[Other controls in the colorimetric device]
Other controls in the colorimetric device 1 will be described below.
(1) The MCU 10 of the colorimetry device 1 automatically shifts to the power saving mode when the device has not been operated for a predetermined time, and turns off the display unit 15 . Further, when the non-operating state has passed for a predetermined time after that, the power of the device is automatically turned off. As a result, heat generation and power consumption can be suppressed.

(2) The MCU 10 reduces the clock rate of the microcomputer until the decision button 54 (see FIG. 5, etc.) is pressed in order to perform colorimetry while the power is on. When the determination button 54 (see FIG. 5, etc.) is pressed in order to perform colorimetry while the power is on, the clock rate of the microcomputer is increased and colorimetry processing is performed. Then, when the colorimetric processing is completed, the clock rate of the microcomputer is lowered. As a result, heat generation and power consumption can be suppressed.

(3) The orientation of the user interface of the display unit 15 can be changed according to user settings. 16 to 19, the user is positioned in the -Y direction with respect to the colorimetric device 1. With the colorimetric device 1 oriented as shown in FIG. , to the user located in the -Y direction with respect to the colorimetric device 1. FIG. Similarly, with the colorimetric device 1 oriented as shown in FIG. 17, the orientation of the user interface displayed on the display unit 15 can be adjusted to suit the user positioned in the −Y direction with respect to the colorimetric device 1 . Similarly, when the colorimetry device 1 is oriented as shown in FIG. 18, the orientation of the user interface displayed on the display unit 15 can be adjusted for the user positioned in the −Y direction with respect to the colorimetry device 1 . Similarly, with the colorimetric device 1 oriented as shown in FIG. 19, the orientation of the user interface displayed on the display unit 15 can be adjusted to suit the user positioned in the -Y direction with respect to the colorimetric device 1 .

The orientation of the user interface described above can be set by the user through a setting screen realized on the display unit 15 .
As described above, since the orientation of the user interface displayed on the display unit 15 can be changed according to the orientation of the colorimetric device 1 as viewed by the user, the usability for the user is improved.
Note that the MCU 10 also changes the function of the cross button 60 according to the orientation of the user interface displayed on the display unit 15 . For example, in the state shown in FIG. 16, reference numeral 61 is the up button, reference numeral 62 is the down button, reference numeral 63 is the left button, and reference numeral 64 is the right button. is the right button, reference numeral 63 is the down button, and reference numeral 64 is the up button. Similarly, in the state shown in FIG. 18, reference numeral 61 is the right button, reference numeral 62 is the left button, reference numeral 63 is the up button, and reference numeral 64 is the down button. Similarly, in the state shown in FIG. 19, reference numeral 61 is the down button, reference numeral 62 is the up button, reference numeral 63 is the right button, and reference numeral 64 is the left button.

(4) The ring-shaped light-emitting portion 59 formed around the decision button 54 is controlled as follows.
For example, in the power-off state, the light emitting unit 59 is turned off. However, when the device is powered off and the battery is being charged, the light emitting unit 59 lights up in white.
In the power-on state, the light-emitting unit 59 lights up in blue when colorimetry is possible.
If an error occurs while the power is on, the light emitting unit 59 lights up in orange.
In the power saving mode, the light emitting unit 59 emits blue light while reducing the amount of light.
In addition, in the power saving mode, when the remaining battery level is low, or when the temperature change from the current temperature to the first reference temperature exceeds the threshold Sa as described above, that is, when it is necessary to acquire the reflection reference value , the light-emitting portion 59 blinks in white while the amount of light is suppressed.
In addition, in the state of power saving mode, white lighting is performed while the amount of light is suppressed while the battery is being charged.
In addition, when an error occurs in the power saving mode, the light emitting unit 59 lights up in orange.
As described above, the current state of the device can be notified to the user by the light emission state of the light emitting portion 59. Particularly, even when the display portion 15 is turned off, the user can grasp the current state of the device, thereby improving usability.
In addition to expressing the device state by the light emitting unit 59, the device state may be expressed by a beep sound. For example, the user can be alerted to the status of the device by generating a beep when the battery is low or when an error occurs.

The present invention is not limited to the respective embodiments described above, and various modifications are possible within the scope of the invention described in the claims, which are also included in the scope of the present invention. One thing goes without saying.
For example, in the above-described embodiment, the colorimetry device 1 incorporates the battery 17, but the battery 17 may be detachable, that is, even if the colorimetry device 1 does not incorporate the battery 17, good. In that case, the battery 17 may be a primary battery that does not repeatedly charge and discharge.

In this embodiment, the incident light processing unit 2 includes an optical filter device 3 and a light receiving unit 4. The optical filter device 3 is a wavelength variable Fabry-Perot etalon that transmits a predetermined wavelength component of incident light. However, it is not limited to this. For example, a spectroscopic method using a diffraction grating may be used as the spectroscopic method. Further, the device configuration may employ a stimulus value direct reading method in which three stimulus values that are the basis of color are directly measured as the principle of colorimetry.
Also, in the present embodiment, an LED is used as the light emitting element used for the light emitting section 9, but the present invention is not limited to this, and a xenon lamp, for example, may be used.

DESCRIPTION OF SYMBOLS 1... Colorimetry apparatus 1a... Main body assembly 2... Incident light processing part 3... Optical filter device 4... Light receiving part 4a... Photodiode 5... PD board 6... Capacitance detection part 7... Band Pass filter 9 Light-emitting unit 10 MCU 11 12 Wired IF 13 Wireless communication unit 14 Operation unit 15 Display unit 16 Battery control unit 17 Battery 17a First End 17b Second end 18 Third thermistor 19 Second thermistor 20 First thermistor 21 Opening forming member 21a Opening 29 Shielding sheet 30 First glass Member 31 Second glass member 32 Case 33 Joining member 34 Fixing material 35 Wire bonding 36 Electrode 37 Base substrate 38 Diaphragm substrate 39 Mirror 40 Fixed electrode , 41... Movable electrode, 42... Diaphragm part, 43... Bonding film, 45... Variable wavelength interference filter, 50... Apparatus body, 50a... Front surface, 50b... Right side surface, 50c... Left side surface, 50d... Rear surface, 50e... Top surface, 50f...bottom surface 50g...grip portion 50m...opening 51...main housing 51a...front wall portion 51b...right wall portion 51c...left wall portion 51d...rear wall portion 51e...front inner wall surface 51f ... rear inner wall surface, 51g ... concave portion, 52 ... upper housing, 53 ... bottom housing, 53a ... opening, 53c ... first upper guide section, 53d ... second upper guide section, 53e ... third upper guide section, 53f...Movement restriction part 54...Enter button 54a...Contact 55...Power button 55a...Contact 56...Return button 56a...Contact 57...Display part cover 58a, 58b...Vertical line 58c, 58d... Horizontal line 59 Light-emitting part 60 Cross button 61 Upper button 61a Contact 62 Lower button 62a Contact 63 Left button 63a Contact 64 Right button 64a Contact 65 Panel board 66 LCD connector 67 LCD 67a Cable 68 First board connector 70 Battery control board 71 Reset switch 72 First battery connector 73 Second battery connector , 74... Second board connector, 80... Light receiver board, 81... Light receiver module, 82... Third board connector, 83... Fourth board connector, 84... Fifth board connector, 85... Light emitter board, 86... light emitting element, 87... light condensing member, 87a... measurement window, 88... sixth board connector, 89... light shielding member, 90... FFC, 91... connection cable, 9 2 First battery cable 93 Second battery cable 100 Frame assembly 110 Shutter unit 111 Shutter holding member 112 Shutter member 113 Link member 125 White plate 127 Magnet 128 ... shutter sensor, 200 ... measurement object

Claims (11)

an opening formed in an opening forming member arranged on the bottom surface of the apparatus for taking in the light arriving from the object to be measured into the inside of the apparatus;
a light emitting unit that emits light for measurement toward the object to be measured;
an incident light processing unit that processes light incident through the opening;
a shutter unit that can be displaced between a closed position that covers the opening and an open position that opens the opening, the shutter unit having a reflection reference surface at a position facing the opening that serves as a reference for reflectance; ,
a control unit capable of executing a reference value acquisition process for acquiring a reflection reference value using the reflection reference surface;
A temperature detection unit for detecting temperature is provided inside the device,
The control unit acquires a reference temperature when executing the reference value acquisition process,
issuing an alert if the temperature change relative to the reference temperature exceeds a threshold;
A colorimetric device characterized by: 2. The colorimetric apparatus according to claim 1, wherein when a temperature change with respect to the reference temperature is equal to or less than the threshold, the control unit uses a correction value for correcting deviation of the measurement result due to the temperature change. correct the result,
issuing an alert if the temperature change relative to the reference temperature exceeds the threshold;
A colorimetric device characterized by: 3. The colorimetric device according to claim 1, wherein the temperature detection unit is provided at a position where the light emitting unit is arranged.
A colorimetric device characterized by: 4. The colorimetric device according to claim 3, wherein the temperature detection unit is a first temperature detection unit, and a second temperature detection unit for detecting temperature is provided in the incident light processing unit,
The control unit acquires the reference temperature and a temperature change with respect to the reference temperature by the first temperature detection unit, and uses the temperature acquired by the second temperature detection unit for controlling the incident light processing unit.
A colorimetric device characterized by: 5. The colorimetric device according to claim 1, wherein the control unit issues an alert when the elapsed time from execution of the reference value acquisition process exceeds a specified time.
A colorimetric device characterized by: The colorimetric device according to any one of claims 1 to 5, comprising a display unit for performing various displays,
The alert includes a display that guides the operation of obtaining the reflection reference value using the reflection reference surface on the display unit.
A colorimetric device characterized by: 7. The colorimetry apparatus according to claim 6, wherein when receiving a command to turn on the power of the apparatus, the control unit causes the display unit to display guidance for an operation of acquiring the reflection reference value using the reflection reference surface. to display
A colorimetric device characterized by: 8. The colorimetric device according to any one of claims 1 to 7, wherein after issuing the alert, the control unit restricts colorimetry until the reference value acquisition process is performed.
A colorimetric device characterized by: 9. The colorimetric apparatus according to claim 1, further comprising position detection means for detecting the position of said shutter unit,
When executing the reference value acquisition process, the control unit acquires the reflection reference value if the shutter unit is at the closed position, and acquires the reflection reference value if the shutter unit is at the open position. Hold,
A colorimetric device characterized by: 10. The colorimetric device according to any one of claims 1 to 9, wherein the incident light processing unit includes a variable wavelength optical filter that transmits a predetermined wavelength component of incident light,
a light receiving unit that receives light transmitted through the optical filter;
A colorimetric device characterized by: 11. The colorimetric device of claim 10, wherein the optical filter is a Fabry-Perot etalon.
A colorimetric device characterized by:

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